Time Resolved Spectroscopic Investigations to Compare the Photophysical Properties of a Short-Chain Dyad When Combined with Silver and Gold Nanoparticles to Form Nanocomposite Systems

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

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Antibacterial and Anti-Biofilm Biosynthesised Silver and Gold Nanoparticles for Medical Applications: Mechanism of Action, Toxicity and Current Status

Current Drug Delivery ◽

10.2174/1567201817666191227094334 ◽

2020 ◽

Vol 17 (2) ◽

pp. 88-100 ◽

Cited By ~ 8

Author(s):

Sundos Suleman Ismail Abdalla ◽

Haliza Katas ◽

Fazren Azmi ◽

Mohd Fauzi Mh Busra

Keyword(s):

Gold Nanoparticles ◽

Synthesis Method ◽

Chemical Characterization ◽

Current Status ◽

Silver And Gold Nanoparticles ◽

Physical And Chemical Characterization ◽

Biosynthesized Agnps ◽

Physical And Chemical ◽

Insight Into ◽

Bio Synthesis

Fast progress in nanoscience and nanotechnology has contributed to the way in which people diagnose, combat, and overcome various diseases differently from the conventional methods. Metal nanoparticles, mainly silver and gold nanoparticles (AgNPs and AuNPs, respectively), are currently developed for many applications in the medical and pharmaceutical area including as antibacterial, antibiofilm as well as anti-leshmanial agents, drug delivery systems, diagnostics tools, as well as being included in personal care products and cosmetics. In this review, the preparation of AgNPs and AuNPs using different methods is discussed, particularly the green or bio- synthesis method as well as common methods used for their physical and chemical characterization. In addition, the mechanisms of the antimicrobial and anti-biofilm activity of AgNPs and AuNPs are discussed, along with the toxicity of both nanoparticles. The review will provide insight into the potential of biosynthesized AgNPs and AuNPs as antimicrobial nanomaterial agents for future use.

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Stabilization of Silver and Gold Nanoparticles: Preservation and Improvement of Plasmonic Functionalities

Chemical Reviews ◽

10.1021/acs.chemrev.8b00341 ◽

2018 ◽

Vol 119 (1) ◽

pp. 664-699 ◽

Cited By ~ 107

Author(s):

Hyunho Kang ◽

Joseph T. Buchman ◽

Rebeca S. Rodriguez ◽

Hattie L. Ring ◽

Jiayi He ◽

...

Keyword(s):

Gold Nanoparticles ◽

Silver And Gold Nanoparticles

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Determining Excited-State Structures and Photophysical Properties in Phenylphosphine Rhenium(I) Diimine Biscarbonyl Complexes Using Time-Resolved Infrared and X-ray Absorption Spectroscopies

Inorganic Chemistry ◽

10.1021/acs.inorgchem.1c00146 ◽

2021 ◽

Author(s):

Yuushi Shimoda ◽

Kiyoshi Miyata ◽

Masataka Funaki ◽

Takumi Ehara ◽

Tatsuki Morimoto ◽

...

Keyword(s):

Excited State ◽

Photophysical Properties ◽

Time Resolved ◽

X Ray ◽

X Ray Absorption

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Photophysical properties and fluorosolvatochromism of D–π–A thiophene based derivatives

RSC Advances ◽

10.1039/d0ra08433f ◽

2020 ◽

Vol 10 (71) ◽

pp. 43459-43471

Author(s):

Hussain A. Z. Sabek ◽

Ahmed M. M. Alazaly ◽

Dina Salah ◽

Hesham S. Abdel-Samad ◽

Mohamed A. Ismail ◽

...

Keyword(s):

Photophysical Properties ◽

Fluorescence Emission ◽

Time Resolved ◽

Time Resolved Spectroscopy ◽

Solvation Models

Solvation-dependent photophysical properties of two push–pull thiophene-based compounds with donor–π–acceptor (D–π–A) structures were investigated using absorption, fluorescence emission and time resolved spectroscopy, and supported by different solvation models.

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